FA72
Frame ID: FA 72
Sample ID: 92103 (slide 285-36)
Magnification: 330 microns on long side
Illuminator: Vertical
Objective: 32x oil
Polarizer: Out
Analyzer: Out
Retarder Plate: Out
Filter:
Important Features: Spinel
Fine spinel dendrites in glass. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.